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PDF Merger — Combine PDF Files Free, No Upload

Merge PDF files into one in your browser: drag to reorder, no upload, no watermark, no sign-up. Free and instant, safe for private documents.

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Drop PDF files here or click to upload. Then drag the ⠿ handle (or use the ↑ ↓ buttons) to set the order.

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Merge PDF files in your browser — no upload required

Combining multiple PDFs into one document is one of the most common office tasks — but most online tools upload your files to a remote server, charge after a few uses, or require an account. This free PDF merger runs entirely in your browser using pdf-lib. Your documents never leave your device, which makes it safe for confidential contracts, tax documents, medical records, or any PDF containing private information.

How to merge PDFs step by step

Upload two or more PDF files using the file picker or drag-and-drop zone. Once uploaded, drag each file by its ⠿ handle (works with a finger on a phone) or use the ↑ ↓ buttons to put the files in the order you want — the final merged PDF will follow this exact sequence. Click Merge and the tool combines the documents client-side in seconds. Download the result as a single PDF. There is no limit on the number of files you can merge; very large PDFs (over 100 MB each) may take longer depending on your device's speed.

Are bookmarks and links preserved?

Internal hyperlinks and annotations within each individual PDF are preserved in the merged output. Cross-document bookmarks — links from one PDF that reference pages in another — are not automatically rewritten, since the target page numbers shift when files are combined. If your workflow depends on cross-document links, update them manually in a PDF editor after merging. Table-of-contents bookmarks from the original files are retained but may point to unexpected page numbers in the merged document.

Merging password-protected PDFs

PDFs protected with an owner password (which restricts printing or editing) can usually be loaded and merged without any special steps. A PDF that needs a password to open is different: this tool does not ask for one, so remove the password first by opening the file in a PDF reader, entering the password and saving or printing it as a new PDF. Merging a locked file can give blank or unreadable pages, so always look through the result before you send it.

Need a PDF to try it on?

The sample PDF files give you valid PDFs of exact sizes, from 100 KB to 100 MB, built in your browser, so you can try a merge, or an upload limit, without using a real document.

Common use cases

Merge PDF is most often used to combine scanned documents into a single file for submission, assemble multi-chapter reports or thesis documents, consolidate monthly bank or invoice PDFs into a yearly archive, combine cover letter and CV into one attachment for job applications, and join separately exported slides or handouts into one presentation PDF.

What this tool does not do

It orders and joins whole files; it does not pick single pages, so use the PDF splitter first if you only need some pages, and the PDF rotate tool to straighten sideways scans. It accepts PDFs only, so turn photos into a PDF with image to PDF before adding them. The merged file is roughly the combined size of its parts: if it must fit under an upload or email limit, finish with the PDF compressor.

Frequently asked questions

How many PDFs can I merge?
There is no hard limit on the number of files — you can merge as many PDFs as your device's available memory allows. Very large PDFs over 100 MB each may be slow to process on lower-end devices or mobile phones. Add your files, then rearrange them by dragging the handle on each row (touch-friendly) or by using the up and down arrows before generating the merged output.
Will the merged PDF keep bookmarks and hyperlinks?
Internal hyperlinks and annotations within each individual PDF are preserved in the merged output. The page order in the merged file matches the order you arrange the files in the tool. However, cross-document bookmarks or a unified table of contents are not automatically generated — the merged PDF will not have a new bookmark panel linking to each original document's first page.
Can I merge password-protected PDFs?
PDFs with only an owner password (which restricts printing or editing but not viewing) can be merged. This tool does not ask for a password, so a PDF that needs one to open should have it removed first: open it in a PDF reader, enter the password, then save or print it as a new PDF, and merge that copy. Merging a file that is locked to the tool can produce blank or unreadable pages, so check the result before sending it.
Is my PDF uploaded anywhere when I merge it?
No. The files are read and combined inside your browser with the pdf-lib library; nothing is sent to a server, stored or logged. That makes it suitable for contracts, tax papers, ID scans and medical records. There is no account, no watermark and no limit on how many times you use it.
How do I combine photos or scans with PDFs?
The merger takes PDF files only. Turn the images into a PDF first with the image to PDF tool, then add that PDF here alongside the others and put the files in the order you want. This is the usual route for submitting a scanned application: photos of each page become one PDF, which is merged with the typed documents.
How do I make the merged PDF smaller?
Merging copies the pages as they are, so the merged file is about the size of the originals added together. If it is over an upload or email limit, run it through the PDF compressor, which can aim for an exact size such as 200 KB or 2 MB. Compress after merging, once, rather than compressing each file separately.
Can I merge PDFs on my phone?
Yes. Open the page in your phone's browser, choose the PDFs from your files, and reorder them by dragging each row's handle with a finger or with the up and down buttons. Large files are limited by the phone's memory, so merge a few at a time if it slows down.
Can I choose or reorder individual pages while merging?
The merger orders whole files, not single pages. To keep only some pages first, use the PDF splitter; to turn pages the right way up, use the PDF rotate tool. Then merge the results in the order you want.

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